#pragma once

#include "Epoller.hpp"

uint32_t EVENT_IN = (EPOLLIN);
uint32_t EVENT_OUT = (EPOLLOUT);

class EpollServer:public nocopy
{
    static const int num = 64;
public:
    EpollServer(int port)
        :_port(port)
        ,_listsocket_ptr(new Sock())
        ,_epoller_ptr(new Epoller())
    {}
    void Init()
    {
        _listsocket_ptr->Socket();
        _listsocket_ptr->Bind(_port);
        _listsocket_ptr->Listen();

        lg(Info,"create listen socket success: %d\n",_listsocket_ptr->Fd());
    }
    void Accepter()
    {
        // 获取一个新连接
        std::string clientip;
        uint16_t clientport;
        int sock = _listsocket_ptr->Accept(clientip,clientport);
        if(sock > 0)
        {
            // 不能直接读取
            _epoller_ptr->EpollerUpdate(EPOLL_CTL_ADD,sock,EVENT_IN);
            lg(Info,"get a new link, client info@ %s:%d",clientip.c_str(),clientport);
        }
    }
    void Recver(int fd)
    {
        char buffer[1024];
        ssize_t n = read(fd,buffer,sizeof(buffer)-1);
        if(n > 0)
        {
            buffer[n] = 0;
            std::cout << "get a message: " << buffer << std::endl;

            // write
            std::string echo_str = "server echo $ ";
            echo_str += buffer;
            write(fd,echo_str.c_str(),echo_str.size());
        }
        else if(n == 0)
        {
            lg(Info, "client quit, me too, close fd is : %d",fd);
            _epoller_ptr->EpollerUpdate(EPOLL_CTL_DEL,fd,0);
            close(fd);
        }
        else
        {
            lg(Warning,"recv error: fd is : %d",fd);
            _epoller_ptr->EpollerUpdate(EPOLL_CTL_DEL,fd,0);
            close(fd);
        }
    }
    void Dispatcher(struct epoll_event revs[],int num)
    {
        for(int i = 0;i < num;i++)
        {
            uint32_t events = revs[i].events;
            int fd = revs[i].data.fd;
            if(events & EVENT_IN)
            {
                if(fd == _listsocket_ptr->Fd())
                {
                    Accepter();
                }
                else
                {
                    // 其它fd上面的普通读取事件就绪
                    Recver(fd);
                }
            }
            else if(events & EVENT_OUT)
            {}
            else
            {}
        }
    }
    void Start()
    {
        // 将listensock添加到epoll中，listensock和他关心的事件添加到内核epoll模型rb_tree中
        _epoller_ptr->EpollerUpdate(EPOLL_CTL_ADD,_listsocket_ptr->Fd(),EVENT_IN);
        struct epoll_event revs[num];
        while(true)
        {
            int n = _epoller_ptr->EpollerWait(revs,num);
            if(n > 0)
            {
                // 有事件就绪
                lg(Debug,"event happened, fd is : %d", revs[0].data.fd);
                Dispatcher(revs,n);
            }
            else if(n == 0)
            {
                lg(Info,"time out...");
            }
            else
            {
                lg(Error,"epoll wait error");
            }
        }
    }
    ~EpollServer()
    {
        _listsocket_ptr->Close();
    }
private:
    std::shared_ptr<Sock> _listsocket_ptr;
    std::shared_ptr<Epoller> _epoller_ptr;
    uint16_t _port;
};